Channel Axes; Geometry Axes; Special Axes - Siemens SINUMERIK 840D sl Function Manual

K2: Axis Types, Coordinate Systems, Frames
10.2 Axes
● Axes for tool magazine
● Axes for automatic tool changer
● Spindle sleeves
● Axes for pallet changers
● Etc.
10.2.3

Channel axes

Meaning
Each geometry axis and each special axis is assigned to a channel. Geometry axes and
additional axes are always traversed in "their" channel.
10.2.4

Geometry axes

Meaning
The three geometry axes always make up a fictitious rectangular coordinate system.
By using FRAMES (offset, rotation, scaling, mirroring), it is possible to image geometry axes
of the workpiece coordinate system (WCS) on the BCS.
Application
Geometry axes are used to program the workpiece geometry (the contour).
Plane selection G17, G18 and G19 (DIN 66217) always refers to the three geometry axes. That
is why it is advantageous to name the three geometry axes X, Y and Z.
10.2.5

Special axes

Significance
In contrast to geometry axes, no geometrical relationship is defined between the special axes.
Note
Geometry axes have an exactly defined relationship in the form of a rightangled coordinate
system.
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions